llvm-svn: 47264

llvm-svn: 47263

For now, avoid commuting def MI for copy MI's whose source is not killed. That simply trade a live interval for another and because only the non-two-address operands can be folded into loads, may end up pessimising code.

llvm-svn: 47262

this speeds it up 2.3% on eon.

llvm-svn: 47261

llvm-svn: 47258

a function must be the first parameter.

llvm-svn: 47254

Fix a comment, and a bug where we weren't applying the tail call logic in cases that failed the first test.

llvm-svn: 47253

llvm-svn: 47252

llvm-svn: 47251

If we see a memcpy of a pointer, make sure to check later
uses of the pointer as well.

llvm-svn: 47250

llvm-svn: 47248

Also, noalias arguments are be considered "like" stack allocated ones for this purpose, because
the only way they can be modref'ed is if they escape somewhere in the current function.

llvm-svn: 47247

the second half of PR2047

llvm-svn: 47244

llvm-svn: 47242

that is also a subtract.  This implements PR2047 and Transforms/Reassociate/subtest2.ll 

llvm-svn: 47241

functionality change.

llvm-svn: 47239

llvm-svn: 47237

is not passed as an argument to a trampoline intrinsic.

llvm-svn: 47220

llvm-svn: 47219

I cannot find a libgcc function for this builtin.  Therefor expanding it to a noop (which is how it use to be treated).  If someone who knows the x86 backend better than me could tell me how to get a lock prefix on an instruction, that would be nice to complete x86 support.

llvm-svn: 47213

br_cc.  This fixes 5 "make check" failures.

llvm-svn: 47212

llvm-svn: 47208

llvm-svn: 47204

llvm-svn: 47200

it actually does. Simplify CountOperands a little by reusing
ComputeMemOperandsEnd. And reword some comments for both.

llvm-svn: 47198

llvm-svn: 47196

tblgen will complain if a sign-extended constant does not fit into a
data type smaller than i32, e.g., i16. This causes a problem when certain
hex constants are used, such as 0xff for byte masks or immediate xor
values.

tblgen will try the sign-extended value first and, if the sign extended
value would overflow, it tries to see if the unsigned value will fit.
Consequently, a software developer can now safely incant:

	(XORHIr16 R16C:$rA, 0xffff)

which is somewhat clearer and more informative than incanting:

	(XORHIr16 R16C:$rA, (i16 -1))

even if the two are bitwise equivalent.

Tblgen also outputs the 64-bit unsigned constant in the generated ISel code
when getTargetConstant() is invoked.

llvm-svn: 47188

llvm-svn: 47179

we had reached the "fake bucket" after the last bucket, allowing the iterator
in some cases to run off the end of the hashtable.

llvm-svn: 47178

with the TIED_TO attribute.

llvm-svn: 47177

that should be checked for the TIED_TO attribute instead of
using CountOperands.

llvm-svn: 47176

in a ret node.  These are created as i32 constants
but on some platforms i32 is not legal.  This
fixes 26 "make check" failures, for example
Alpha/2005-07-12-TwoMallocCalls.ll.

llvm-svn: 47172

really really really need refactoring :(

llvm-svn: 47171

the global comment.  This prevents printing things like:

...  # foo
bar

when the name is "foo\nbar".

llvm-svn: 47170

when they occur in the name, just like " is escaped.

llvm-svn: 47169

llvm-svn: 47168

register defs and uses after each successful coalescing.
- Also removed a number of hacks and fixed some subtle kill information bugs.

llvm-svn: 47167

machine instr will change its definition register.

llvm-svn: 47166

llvm-svn: 47164

with a hard-coded operand number.

llvm-svn: 47163